diff --git a/include/loki/details/parser.hpp b/include/loki/details/parser.hpp
index 86e3b244..a214774f 100644
--- a/include/loki/details/parser.hpp
+++ b/include/loki/details/parser.hpp
@@ -46,6 +46,10 @@ class DomainParser
 
 public:
     DomainParser(const fs::path& file_path, bool strict = false, bool quiet = true);
+    DomainParser(const DomainParser& other) = delete;
+    DomainParser& operator=(const DomainParser& other) = delete;
+    DomainParser(DomainParser&& other) = default;
+    DomainParser& operator=(DomainParser&& other) = default;
 
     /// @brief Get factories to create additional PDDL objects.
     PDDLFactories& get_factories();
@@ -73,7 +77,11 @@ class ProblemParser
     Problem m_problem;
 
 public:
-    explicit ProblemParser(const fs::path& file_path, DomainParser& domain_parser, bool strict = false, bool quiet = true);
+    ProblemParser(const fs::path& file_path, DomainParser& domain_parser, bool strict = false, bool quiet = true);
+    ProblemParser(const ProblemParser& other) = delete;
+    ProblemParser& operator=(const ProblemParser& other) = delete;
+    ProblemParser(ProblemParser&& other) = default;
+    ProblemParser& operator=(ProblemParser&& other) = default;
 
     /// @brief Get position caches to be able to reference back to the input PDDL file.
     const PDDLPositionCache& get_position_cache() const;
diff --git a/include/loki/details/pddl/factories.hpp b/include/loki/details/pddl/factories.hpp
index 0c274fa8..edf80abd 100644
--- a/include/loki/details/pddl/factories.hpp
+++ b/include/loki/details/pddl/factories.hpp
@@ -141,12 +141,10 @@ class PDDLFactories
         problems(ProblemFactory(10))
     {
     }
-
-    // delete copy and move to avoid dangling references.
     PDDLFactories(const PDDLFactories& other) = delete;
     PDDLFactories& operator=(const PDDLFactories& other) = delete;
-    PDDLFactories(PDDLFactories&& other) = delete;
-    PDDLFactories& operator=(PDDLFactories&& other) = delete;
+    PDDLFactories(PDDLFactories&& other) = default;
+    PDDLFactories& operator=(PDDLFactories&& other) = default;
 
     Requirements get_or_create_requirements(RequirementEnumSet requirement_set)
     {
diff --git a/include/loki/details/pddl/factory.hpp b/include/loki/details/pddl/factory.hpp
index cb3b25dd..e6d9bcdd 100644
--- a/include/loki/details/pddl/factory.hpp
+++ b/include/loki/details/pddl/factory.hpp
@@ -50,6 +50,10 @@ class PDDLFactory
 
 public:
     explicit PDDLFactory(size_t elements_per_segment) : m_persistent_vector(SegmentedVector<HolderType>(elements_per_segment)) {}
+    PDDLFactory(const PDDLFactory& other) = delete;
+    PDDLFactory& operator=(const PDDLFactory& other) = delete;
+    PDDLFactory(PDDLFactory&& other) = default;
+    PDDLFactory& operator=(PDDLFactory&& other) = default;
 
     /// @brief Returns a pointer to an existing object
     ///        or creates it before if it does not exist.